Continuous treatment device for high-salinity high-COD chemical hazardous waste

Abstract

The invention discloses a continuous treatment device for high-salinity high-COD chemical hazardous waste. The continuous treatment device for the high-salinity high-COD chemical hazardous waste comprises a pretreatment system, a water pyrolysis system, a catalytic reforming system, a high-concentration brine evaporation salt decomposition system, a heating system, an auxiliary system, a methane comprehensive utilization system and power source equipment. The pretreatment system comprises a material storage tank, a metering device, a water tank, a pretreatment mixing device, a high-pressure water pump and a material feeding pump. The water pyrolysis system comprises a water pyrolysis reactor, a gas-solid separator and a mixed feeding pump. The catalytic reforming system comprises a first-grade reactor, a second-grade reactor, a third-grade reactor and a fourth-grade reactor which are sequentially connected in series. The high-concentration brine evaporation salt decomposition system comprises a brine tank, a brine pump, an evaporation chamber and a heat exchanger. The heating system comprises a first heating jacket and a second heating jacket. The auxiliary system comprises an inert gas storage tank and an inert gas pump. The methane comprehensive utilization system comprises a methane recycling device which is sequentially connected with the first heating jacket, the second heating jacket and the fourth-grade reactor in series.

Description

technical field [0001] The invention belongs to the technical field of chemical hazardous waste treatment, and in particular relates to a device for continuously treating high-salt and high-COD chemical hazardous waste. Background technique [0002] Hazardous chemical waste refers to solid, semi-solid or slurry waste produced in the chemical production process, including unqualified products or intermediate products, by-products, spent catalysts, waste catalysts, etc. Waste additives, unreacted raw materials and raw material impurities, etc., also include wastes discharged directly from reaction devices or wastes discharged from corresponding devices during product hanging, separation, and washing, as well as dust discharged from air pollution control facilities, and waste generated during wastewater treatment Sludge, solid waste generated from equipment maintenance and accident leakage, etc. [0003] Hazardous chemical waste has the following characteristics: (1) The produ...

AI Technical Summary

Problems solved by technology

A considerable part of chemical hazardous waste has the characteristics of acute toxicity, reactivity, and corrosion, which will pose a greater threat to human health and the environment. If it is not effectively disposed of, it will have a greater impact on the human body and the environment.

(3) Great resource utilization potential

However, when incineration technology treats such hazardous wastes, there are the following problems: (1) In the state of high-temperature melting, the fouling of the rotary kiln is serious, and the thermal efficiency is significantly reduced; (2) The corrosion of the equipment is very serious; (3) Most of them contain Chlorine salts will produce a large amount of dioxins during incineration, causing secondary pollution; (4) Most of these hazardous wastes exist in a wet state, resulting in high energy consumption in the incineration method

When safely landfilling such hazardous waste, there are the following problems: (1) a rigid landfill is required, and the project cost is high; (2) it occupies a large area of ​​land; (3) a large amount of high-COD and high-salt leachate will be produced which cannot deal with

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